Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
21% | 79% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
21% | 79% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Market context
Bitcoin is trading in a narrow band around $65,000, so this market is being decided by whether the midday Binance close on 9 August finishes above or below the 8 August noon ET close. Yahoo Finance shows BTC-USD closing at $64,932.57 on 8 August, while live price checks from CoinDesk and other trackers put Bitcoin broadly in the mid-$64,000s to low-$65,000s heading into 9 August.[1][8][20]
The current 21% implied probability for **YES** is low relative to the recent tape, which has been mostly range-bound rather than directional. CoinStats describes Bitcoin as trading between roughly $64,000 and $65,300 over the previous 48 hours, with resistance around $65,600-$65,800 and a larger cap near $66,900, while CoinGecko and CoinLore both frame sentiment as weak-to-neutral even though short-term indicators are not deeply oversold.[2][15][18] That combination usually points to a market where a small move can decide the outcome, but follow-through has been limited.
Traders should watch whether the market can sustain a break above the immediate resistance zone before the noon ET reference candle, because a drift back towards support would favour a lower close on 9 August. CoinStats points to spot ETF demand and softer US labour data as background support, yet also notes that the broader structure remains subdued, which means any fresh macro headline, ETF flow update, or sharp move in US risk assets could still flip the intraday direction quickly.[2]
Methodology
Sports-specific comparison page for Bitcoin Up or Down on August 9?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
Trade Bitcoin Up or Down on August 9? on March Madness Predictions
Live order book, 0% fees, USDC settlement in seconds.
Open live market →